So I have come to the conclusion that aluminum/copper in the gap has no negative effect on the amount of motor force. It is solely based on the gap size of the steel.
My FEMM simulations showed a BL of 14.72 at 1.33 ohms both with and without the aluminum sleeve when keeping the steel gap size the same. I just built my first prototype with the sleeve dimensions of my model and it measured a BL of 14.69 at 1.35 ohms with a DATS.
My FEMM simulations showed a BL of 14.72 at 1.33 ohms both with and without the aluminum sleeve when keeping the steel gap size the same. I just built my first prototype with the sleeve dimensions of my model and it measured a BL of 14.69 at 1.35 ohms with a DATS.
This thread has been silent for some two years now...
@hurrication: the pictures in diymobileaudio are no longer visible. Would you be willing to post those here?
And then an additional question: in case neodym magnet rings are used in a woofer motor, do these need the same re-magnetization treatment conventional ferrite magnets do after assembly of the parts?
@hurrication: the pictures in diymobileaudio are no longer visible. Would you be willing to post those here?
And then an additional question: in case neodym magnet rings are used in a woofer motor, do these need the same re-magnetization treatment conventional ferrite magnets do after assembly of the parts?
The pictures do not exist any longer unfortunately.
With those prototypes, I was assembling them with the neo already being fully charged. No kind of magnetization needed. Ferrite motors need to be zapped after they are assembled because the motors are built with the ferrite not being charged.
With those prototypes, I was assembling them with the neo already being fully charged. No kind of magnetization needed. Ferrite motors need to be zapped after they are assembled because the motors are built with the ferrite not being charged.
